Is this beyond reviving!!

Hi everyone, I'm desperately seeking help on my Dads Lemon Tree. It's at least 15 years old and has never really produced more that a handful of lemons, this is probably due to my Dad's lack of greenfingers !! He does give it summer/ winter feed and has successfully managed to keep it ticking over. About two weeks ago I discovered that my Dad had left the greenhouse door open and we had had a fairly heavy frost the previous night up until then the leaves looked healthy and glossy. So I guess the frost is the culprit. I know nothing about citrus growing but to me it also feels very dry but my Dad insists it says ( not sure where he is getting his info from!!) that at this time of year it mustn't have much water.

What suggestions can anyone offer me ...all will be greatly appreciated.

 

Oops forgot the pics!!

 

My bet is that it is still alive, give a month or so, maybe more and it will start to show new shoots.
Then you can prune back to the new growth.
It should look pretty good by late summer.
But no fruit this year.

OH and yes dont overwater, but keep it slightly moist until its in full growth.

 

Thanks @pete , would you suggest a summer feed yet ? Thanks again

 

I'd suggest no feeding at this point, the roots will still be dormant, wait until new growth is at least 2 or 3 inches long.

 

Brilliant OK @pete we'll hold off from feeding it . Thanks a million for your help

 

Wow!! Very helpful indeed @Marley Farley thank you so much

 

Yes thanks @Marley Farley he has plenty of feed, in fact he made some up today but I suggested he waited until I had heard back from you lovely lot. Good job too as we were advised not to feed it just yet by pete. Trouble is I don't know much about them and I would be very surprised if he is actually feeding it enough too so your earlier advice was very informative .To me though I think it is well too dry, how often do you water yours?

 

The reason I suggest no feed is because the plant is not in growth, and feeding something that is not actually growing is not a good idea.
The plant is in shock, and best left to restart before any feed is applied, IMO.

 

Brilliant info @pete and @Marley Farley thank you so much for your much appreciated responses. I will follow your advice and will hopefully be able to restore it back to good health.